PS vs. PAI
Both PS and PAI are thermoplastics. There are 21 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is PS and the bottom bar is PAI.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 1.9 to 2.9 | |
| 4.0 to 8.3 |
| Elongation at Break, % | 1.8 to 40 | |
| 3.0 to 12 |
| Flexural Strength, MPa | 62 to 80 | |
| 160 to 320 |
| Impact Strength: Notched Izod, J/m | 19 to 45 | |
| 45 to 140 |
| Tensile Strength: Ultimate (UTS), MPa | 32 to 44 | |
| 100 to 180 |
Thermal Properties
| Glass Transition Temperature, °C | 100 | |
| 280 |
| Maximum Temperature: Autoignition, °C | 360 to 420 | |
| 530 |
| Maximum Temperature: Decomposition, °C | 320 to 330 | |
| 490 |
| Maximum Temperature: Mechanical, °C | 70 | |
| 260 |
| Specific Heat Capacity, J/kg-K | 1250 to 1400 | |
| 910 to 1000 |
| Thermal Conductivity, W/m-K | 0.14 to 0.22 | |
| 0.26 to 0.53 |
| Thermal Expansion, µm/m-K | 80 to 98 | |
| 15 to 34 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.0 | |
| 1.4 to 1.6 |
| Limiting Oxygen Index (LOI), % | 18 | |
| 45 |
| Water Absorption After 24 Hours, % | 0.040 to 0.080 | |
| 0.3 to 0.4 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.0 to 1.5 | |
| 1.6 to 3.2 |
| Stiffness to Weight: Bending, points | 40 to 45 | |
| 38 to 47 |
| Strength to Weight: Axial, points | 8.5 to 12 | |
| 19 to 34 |
| Strength to Weight: Bending, points | 22 to 26 | |
| 33 to 49 |
| Thermal Diffusivity, mm2/s | 0.11 to 0.15 | |
| 0.16 to 0.41 |
| Thermal Shock Resistance, points | 11 to 15 | |
| 48 to 110 |